Shimano RD-R8000/RX812 Ultegra/GRX Rear Mech Pulley Set

Shimano RD-R8000/RX812 Ultegra/GRX rear mech pulley set Genuine Shimano replacement pulley set designed for Ultegra and GRX rear derailleurs. This OEM component maintains precise chain tension and smooth shifting performance across your drivetrain. Compatible with both road and gravel setups, the pulley set ensures reliable gear changes under load. Direct replacement for worn or damaged pulleys—a cost-effective way to restore derailleur responsiveness without replacing the entire mechanism. Essential maintenance for cyclists demanding consistent performance.